.container {
  width: 100vw;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: flex-start;
}
.body {
  position: relative;
  flex: 1;
  width: 100%;
}
.inner {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}
.nav {
  flex-shrink: 0;
  width: 100%;
  border-top: 1px solid #eee;
}
.page {
  height: 100%;
  overflow: auto;
  display: none;
  &.active {
    display: block;
  }
}